107 lines
4.1 KiB
C++
107 lines
4.1 KiB
C++
#include <mbgl/renderer/image_atlas.hpp>
|
|
#include <mbgl/renderer/image_manager.hpp>
|
|
|
|
#include <mapbox/shelf-pack.hpp>
|
|
|
|
namespace mbgl {
|
|
|
|
static constexpr uint32_t padding = 1;
|
|
|
|
ImagePosition::ImagePosition(const mapbox::Bin& bin, const style::Image::Impl& image, uint32_t version_)
|
|
: pixelRatio(image.pixelRatio),
|
|
paddedRect(bin.x, bin.y, bin.w, bin.h),
|
|
version(version_),
|
|
stretchX(image.stretchX),
|
|
stretchY(image.stretchY),
|
|
content(image.content) {}
|
|
|
|
const mapbox::Bin& _packImage(mapbox::ShelfPack& pack,
|
|
const style::Image::Impl& image,
|
|
ImageAtlas& resultImage,
|
|
ImageType imageType) {
|
|
const mapbox::Bin& bin = *pack.packOne(
|
|
-1, image.image.size.width + 2 * padding, image.image.size.height + 2 * padding);
|
|
|
|
resultImage.image.resize({static_cast<uint32_t>(pack.width()), static_cast<uint32_t>(pack.height())});
|
|
|
|
PremultipliedImage::copy(
|
|
image.image, resultImage.image, {0, 0}, {bin.x + padding, bin.y + padding}, image.image.size);
|
|
uint32_t x = bin.x + padding;
|
|
uint32_t y = bin.y + padding;
|
|
uint32_t w = image.image.size.width;
|
|
uint32_t h = image.image.size.height;
|
|
|
|
if (imageType == ImageType::Pattern) {
|
|
// Add 1 pixel wrapped padding on each side of the image.
|
|
PremultipliedImage::copy(image.image, resultImage.image, {0, h - 1}, {x, y - 1}, {w, 1}); // T
|
|
PremultipliedImage::copy(image.image, resultImage.image, {0, 0}, {x, y + h}, {w, 1}); // B
|
|
PremultipliedImage::copy(image.image, resultImage.image, {w - 1, 0}, {x - 1, y}, {1, h}); // L
|
|
PremultipliedImage::copy(image.image, resultImage.image, {0, 0}, {x + w, y}, {1, h}); // R
|
|
}
|
|
return bin;
|
|
}
|
|
|
|
namespace {
|
|
|
|
void populateImagePatches(ImagePositions& imagePositions,
|
|
const ImageManager& imageManager,
|
|
std::vector<ImagePatch>& /*out*/ patches) {
|
|
for (auto& updatedImageVersion : imageManager.updatedImageVersions) {
|
|
const std::string& name = updatedImageVersion.first;
|
|
const uint32_t version = updatedImageVersion.second;
|
|
auto it = imagePositions.find(updatedImageVersion.first);
|
|
if (it != imagePositions.end()) {
|
|
auto& position = it->second;
|
|
if (position.version == version) continue;
|
|
|
|
auto updatedImage = imageManager.getSharedImage(name);
|
|
if (updatedImage == nullptr) continue;
|
|
|
|
patches.emplace_back(*updatedImage, position.paddedRect);
|
|
position.version = version;
|
|
}
|
|
}
|
|
}
|
|
|
|
} // namespace
|
|
|
|
std::vector<ImagePatch> ImageAtlas::getImagePatchesAndUpdateVersions(const ImageManager& imageManager) {
|
|
std::vector<ImagePatch> imagePatches;
|
|
populateImagePatches(iconPositions, imageManager, imagePatches);
|
|
populateImagePatches(patternPositions, imageManager, imagePatches);
|
|
return imagePatches;
|
|
}
|
|
|
|
ImageAtlas makeImageAtlas(const ImageMap& icons,
|
|
const ImageMap& patterns,
|
|
const std::unordered_map<std::string, uint32_t>& versionMap) {
|
|
ImageAtlas result;
|
|
|
|
mapbox::ShelfPack::ShelfPackOptions options;
|
|
options.autoResize = true;
|
|
mapbox::ShelfPack pack(0, 0, options);
|
|
|
|
for (const auto& entry : icons) {
|
|
const style::Image::Impl& image = *entry.second;
|
|
const mapbox::Bin& bin = _packImage(pack, image, result, ImageType::Icon);
|
|
auto it = versionMap.find(entry.first);
|
|
auto version = it != versionMap.end() ? it->second : 0;
|
|
result.iconPositions.emplace(image.id, ImagePosition{bin, image, version});
|
|
}
|
|
|
|
for (const auto& entry : patterns) {
|
|
const style::Image::Impl& image = *entry.second;
|
|
const mapbox::Bin& bin = _packImage(pack, image, result, ImageType::Pattern);
|
|
auto it = versionMap.find(entry.first);
|
|
auto version = it != versionMap.end() ? it->second : 0;
|
|
result.patternPositions.emplace(image.id, ImagePosition{bin, image, version});
|
|
}
|
|
|
|
pack.shrink();
|
|
result.image.resize({static_cast<uint32_t>(pack.width()), static_cast<uint32_t>(pack.height())});
|
|
|
|
return result;
|
|
}
|
|
|
|
} // namespace mbgl
|